“Abyss: The Wraiths of Eden” ($1.49, regularly $6.99) sends you deep underwater to a mysterious world to find your missing fiancée through 40 unique locations with 14 hidden-object scenes.

“Fishdom 3: Special Edition” ($2.49, regularly $4.99) also takes you into the water with a tankful of colorful finned friends that you feed, play with and challenge through 150 levels (an additional 50 bonus levels is exclusive to the Windows 8 version).